Make the non-drawing cases faster in TextMetrics::drawParagraph

[lyx.git] / src / BufferView.h

diff --git a/src/BufferView.h b/src/BufferView.h
index bfdb0bac429ac912613f1b08344534ef65a497f4..f57801f6a3bc6c7335e4fbc3944f943429b85e24 100644 (file)
--- a/src/BufferView.h
+++ b/src/BufferView.h
@@ -44,6 +44,7 @@ class PainterInfo;
 class ParIterator;
 class ParagraphMetrics;
 class Point;
+class TexRow;
 class Text;
 class TextMetrics;
 
@@ -124,12 +125,15 @@ public:
        // Returns the amount of horizontal scrolling applied to the
        // top-level row where the cursor lies
        int horizScrollOffset() const;
+       // Returns the amount of horizontal scrolling applied to the
+       // row of text starting at (pit, pos)
+       int horizScrollOffset(Text const * text,
+                             pit_type pit, pos_type pos) const;
 
-       // Points to the top-level row where the cursor lies (during draw).
-       CursorSlice const & currentRowSlice() const;
-
-       // Points to the top-level row where the cursor lied at last draw event.
-       CursorSlice const & lastRowSlice() const;
+       // Returns true if the row of text starting at (pit, pos) was scrolled
+       // at the last draw event.
+       bool hadHorizScrollOffset(Text const * text,
+                              pit_type pit, pos_type pos) const;
 
        /// reset the scrollbar to reflect current view position.
        void updateScrollbar();
@@ -159,6 +163,8 @@ public:
 
        /// set the cursor based on the given TeX source row.
        void setCursorFromRow(int row);
+       ///
+       void setCursorFromRow(int row, TexRow const & texrow);
 
        /// set cursor to the given inset. Return true if found.
        bool setCursorFromInset(Inset const *);
@@ -349,7 +355,7 @@ private:
 
        // Check whether the row where the cursor lives needs to be scrolled.
        // Update the drawing strategy if needed.
-       void checkCursorScrollOffset();
+       void checkCursorScrollOffset(PainterInfo & pi);
 
        /// The minimal size of the document that is visible. Used
        /// when it is allowed to scroll below the document.